Jesse ditsoct of littletoh



March 4 1924;

R 15,780 DITSON HQIST 2 Sheets-Sheet 1 Dxfiginal Filed July 20. 1921INVENTOR lfesfise Difson H S ATTOR March 4 '1924.

J. DlTsoN HOIST 2 Sheets-Sheet 2 Original Filed July 20. 1921 INVENTORJesSeDatson.

H l5 ATTOR Y Reissued lillar. 4, 1924.

JESSE DITSON, OF LITTLETON, COLORADO,

v Re. 15,780 PATENT OFFICE.

ASSIGNOR TO INGERSOLL-RAND COMPANY,

OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

HOIST.

Original No. 1,421,183, dated June 27, 1922, Serial N0. 486,097, filed-July 20, 19 21.

reissue filed November 22,

To 117 whom it may) concern Be it known that I, Jessa DirsoN, a citizenof the United States, and a resident of Littlcton, county of Arapahoe,State of Colorado, have invented a certain Hoist, of which the followingis a specification, accompanied by drawings.

This invention relates to hoists, but more especially to\ a power drivenhoist of the double drunttpe, in which either drum may be driven rom acommon driving shaft.

Such hoists are particularly useful for haulage purposes or inconnection with 7 other work in which the loadis carried by a continuousrope orcable ada ted to be wound lip-on the haulage or li ting drum 1 asit is unwound from the-tail rope drum.

The objects of the invention are to enable two drums, as for instance ahaulage drum and a tail rope drum, to be driven from a common source byimproved means and devices which automatically disconnect one drum andconnect the other drum to the driving shaft, in accordance with the direction of rotation of the shaft.

Further objects of the invention are to produce a simple, compact,rugged and highly efficient self-contained hoist combining a source ofpower and driving and driven elements within and upon one mounting, soconstructed that all the operativeparts are readily accessible andeasily assembled and disassembled.

Further objects will hereinafter appear, and to all of these ends theinvention consists of the hoist described and claimed in thisspecification and shown in one of its preferred forms in theaccompanying drawings, in which- Figure 1 is a side, elevation of thehoist;

Figure 2 is a longitudinal sectional elevation on the line 2-2 of Figure3;

Figure 3 is a transverse sectional elevation on the line 33 of Figure 2,looking in the direction of the arrows, and Figure 4 is a view similarto Figure 3 with the pawl in a different position.

Referring to the drawings, the base plate A on which the hoist ismounted, is provided with a clamping member preferably 'in the form of asaddle clamp B having the clamping bolts C for se uring the hoist to ,acolumn, cross bar or other support. Any

l i i 1 Application tor 1923. Serial No. 676,465.

suitable motor may be provided for the hoist, and in this instance afluid pressure motor is indicated, comprising the cylinder D mounted onthe frameE bolted to the base (plate as b means of the bolts F. A cyliner head is secured to the cylinder by the cap bolts H and fluidpressure, as for mstance compressed air, is supplied to the motorthrough the inlet J controlled by a suitable valve K in the valve chestL and manipulated by the valve lever O. In this instance the motor isassumed to be a reversible motor, the reversal of which is controlled bythe valve lever 0. An oiling device P of any suitable type may beapplied to the motor. I

A center bearing 'Q'shown in this instance in the form of a shell,having a tubu-' lar body and a flanged portion R, is connected to themotor cylinder D and the cvlinder head G by means of the cap bolts Theopposite end of the center bearingis supported in the gear box- S, whichis secured to the frame A by the bolts T. A center bearing retainingscrew U suitably secures the center bearing to the inner wall V ofthe'gear box S. An oiling connection W. may be provided u on the gearbox. The gearbox cover is secured to the gear box by means of the boltsY. The construction of the motor and frame so far described forms asimple and compact frame for the hoist, easily assembled anddisassembled and permitting ready accessibility to the operative partsof the hoist;

A main driving shaft a passingcentrally through the center bearing Q issupported in the ball bearings 'b and c and provided with the crank discat having the crank pin e connected. to the piston f of the motor bymeans of the ball bearing g, so that the driving shaft a operatesthroughout in ball bearings.

A driving pinion k is keyed to the driving shaft (1 and a retainingwasher j is held against the driving pinion by means of the pin is. Thedriving pinion h meshes with an intermediate gear 0 keyed to thecountershaft 7) operating in the ball bearings 1 bearing Q, from whichpower is taken for driving either one of the two drums.

The haulage drum '0 to which one length of the rope w is adapted to beconnected, rotates upon the center bearing Q and the concentrictail'rope drum a: to which the tail rope 1 is connected preferablyrotates upon t e liaulage drum as indicated par- Figure 2. Suchconstruction of concentric drums materially reduces the" over-all lengthof the hoist and produces a on the opposed drivers either one morecompact and than heretofore.

Means ,are provided for automatically connecting the main driver u toone or the other of the drums v and w in accordance with the directionof rotation of the driving shaft a, and for this purpose the haulagedrum '0 isprovided with a driver a preferably in the form of a ringhaving clutch members in the form of teeth 2 merging into cam surfaces3. The driver 2 is suitably secured to the haulage drum by means of thebolts 4, and for convenience of description may be termed the innerdriver.

The tail rope drum .2: is likewise rovided with a driver 5 opposed tothe driver z and preferably in the form of a ring having clutch membersin the form of teeth 6 facing in the opposite direction from the teeth 2on the drlver z and merging into thecam surfaces 7. The driver 5 15secured to better balanced hoist the tail rope drum m by means of thebolts 8, and for convenience of description may be termed the outerdriver.

The spaced teeth 2 and 6 of each series preferably extend radially or inthe plane of the respective driver on which they are formed.

The terms inner and outer as ap lied to the opposed drivers 2 and 5carried by the drums respectively, are not to be understood asnecessarily limited to ratchet rings concentric with the axis ofrotation of the machine, but are intended to be 'used as suitabledesignations for two opposed ratchet faces for the drums, havingreference to some fixed oint of the machine, which obviously need not bethe driving shaft.

.The main driver u is provided with a movable clutch member 9, referablyin the form of a awl, guided sole y upon the main driver an shown asslidable substantially radially between the lugs 10 projecting inwardlyfrom the main driver u into a position between the inner driver z andouter driver 5, so that the pawl 9 may engage of the inner or outerdrivers as indicated in Figures 3 and 4, in accordance with thedirection of rotation of the driving shaft a.

The pawl 9 as shown, is separate from but carried wholly by the maindriver u and is mounted on the body portion of the main driver at apoint remote, or at a substantial In the operation of the hoist, if itbe assumed that the driving shaft a is rotated in the direction of thearrow 11 in 'Fi ure 3, the main driver u will be rotated y the train ofdirection, and the pawl 9 will have been ushed by one of the camsurfaces 3 on the' inner driver z into enga ement with one of the teeth6 of the outer river 5, thus driving the tail rope drum m in the samedirection as the main driver but in the 0' posite direction to therotation of the driving shaft a. The arrow 12 in Figure 1 on the tailrope drum :0 indicates the direction'of rotation of said drum under suchcircumstances when power'is' ap lied to the drum to he haula e drum '0wind up the tail rope.

driving 8 aft a but is disconnected from the is freely rotated in thesame direction as the the rope tail rope drum m as from .said haulagedrum.

Ulpon reversing the directionof rotation of t e drivin shaft or andcausing it to rotate'in the direction of the arrow 13 in Figure 4, thedirection of rotation'of the is unwinding main driver u will be reversedand the awl One drum or the other will be automatically connected to bedriven from the driving,

the direction of rotlition shaft as often as of the driving shaft isreversed. In a hoist of the character described, a brake is preferablyprovided for oneof the drums, it being unnecessary to provide a brakefor both e drum will be rotated freely in the the haulage drum r in theIll drums in accordance with my construction.

In this instance, the tail rope drum :0 may be conveniently providedwith a flan e 1a to which a brake band 15 having a suitable lining 16'is applied. A brake lever 17 is fulcrumed at 18 on the lugs 19 and onelooped end 20 of the brake band is connected to a pin 21 on the brakelever 17 located further away from the fulcrum 18 than the pin 22 towhich the other looped end 23 of the brake band is connected. Acompression spring 24 beneath thev shorter arm 25 of the brake levercompressed between an adjustin and the frame A. A set screw 2 screw 26holds the 75 gearing described, in the opposite y It is obvious alsothat, owing to the posi-.

tions of the ins 21 and 22 relative to the brake lever fiilcrum 18, thebrake will be automatically ti htened by friction between the flange 14o the tail rope drum :0 and the brake lining 16 in case the drums shouldaccidentally tend to rotate backwardly in the opposite direction fromthat in which power applied. The brake therefore, acts as an automaticsafety device.

I ain not to be understood as limiting the invention to the particulardevices'and constructions shown in the drawings, and (ic T scribed inthe specification, since those skilled in the art may devise equivalentconstruction within the spirit of my invention as defined in theappended claims.

I claim: f

1. In a hoist, the combination of a frame, a driving shaft, two drumsrotatable relatively to the driving shaft, a' motor connected to o eratethe driving shaft, and means inclu ing a movable pawl mounted remotefrom the driving shaft between portions of the drums, for automaticallydisconnecting one drum and connecting the other drum to the drivingshaft in accordance with the direction of rotation of the driving shaft.

2. In a hoist, the combination of a frame, a driving shaft, two drumsrotatable rela-. tively to the driving shaft, :1. motor connect ed tooperate the driving shaft, opposed drivers carried by said drumsrespectively, a main driver connected to be rotated by the drivingshaft, and means including a movable member carried wholly by the maindriver for automatically connectin said main driver to one or the otherof t e said opposed drivers in accordance with the direction of rotationof the driving shaft.

3. In a hoist, the combination of a frame, a drivin shaft, two drumsconcentric with the driving shaft, a motor connected to opcrate thedrivirm shaft, opposed drivers carried by said diums respectively, amain driver rotated by the driving shaft, and a movable member carriedby and guided solely upon the main driver for automatically connectingsaid main driver to oneor the other of the said opposed drivers inaccordance with the direction 'of rotation of the driving shaft.

4. In a hoist, the combination of a frame,

a a driving shaft, two drums concentric with the driving shaft, a motorconnected to operate the driving shaft, opposed drivers carried by saiddrums respectively, a mam driver rotated by the driving shaft, and apawl carried wholly by the. main driver for automatically connectln saidmain driver to one or the other 0 the said opposed drivers in accordancewith the direction of rotation of the driving shaft.

5. In a hoist, the combination of a frame, a driving shaft, two drumsconcentric with the driving shaft, one drum being rotatable upon theother drum, a motor connected to operate the driving shaft, inner andouter concentric drivers carried by the said drums respectively, a maindriver rotated by the.

driving shaft, a movable member carried by the main driver and" locatedbetween the inner and outer drivers, and means for auto maticallyactuating said movable member to connect the main driver to one or theother of the inner and outer drivers in accordance with the direction ofrotation of the driving shaft. I j

6. In a hoist, the combination of a frame, a driving shaft, two drumsconcentric with the driving shaft, one drum being rotatable upon theother drum, a motor connected to operate the driving shaft, inner andouter concentric drivers carried by the said drums respectively, a maindriver rotated by the driving shaft, a pawl carried by the main driverand located between the'inner and outer drivers, and means forautomatically actuating said pawl to connect the main driver to one orthe other of the inner and outer drivers in accordance with thedirection of rotation of the driving shaft,

7. In a hoist, the combination of a frame, a drii'ing'shaft, two drumsrotatable relatively to the driving shaft, 2. motor connected to operatethe driving shaft, means including a movable awl mounted remote from thedriving sha between portions of the drums, for automaticallydisconnecting one drum and connecting the other drum to the drivingshaft in accordance with the direction of rotation of the driving shaft,and a brake for one of said drums.

8. In a hoist, the combination of a frame, a driving shaft, two drumsconcentric with the driving shaft, a motor connected to operate thedriving shaft, opposed driverscarried by said drums respectively, .amain driver rotated by the driving shaft and means including a movablemember carried by and guided solely upon the main driver forautomatically connectin said main driver to one or the other 0 the saidopposediftlrivers in accordance with the direction of rotation of thedriving shaft, and a brake for one of said drums. I

9. In a hoist, the combination of a frame, a driving shaft, two drumsconcentric with the driving shaft, a motor connected to operate thedriving shaft, opposed drivers carried by said drums respectively, amain driver rotated by the driving shaft, means for automaticallyconnecting said main driver to one or the other of the said opposeddrivers in accordance with the direction of rotation of the drivingshaft, and a brake for one of the drums adapted to automatically tightenand retard rotation in a dirsi' tion counter to power applied by thedriving shaft to said drum.

10. In a hoist, the combination of a frame, a driving shaft, a motorconnected to 0perate the driving shaft, a haula drum and a tail ropedrum concentric wit the driving shaft, the tail rope drum being mountedto rotate upon the haulage drum, 8- driver carried by the haula e drum,an opposed driver carried by the tai rope drum, a main driver rotated bythe driving shaft, a movable member carried by said main driver betweenthe said op osed drum drivers,'and means automatically actuating saidmovable member to connect the main driver to one or the other of thesaid opposed drivers in accordance with the direction of rotation of thedriving shaft.

11. In a hoist, the combination of a frame, a driving shaft, a motorconnected to operate the driving shaft, a haulage drum, and

a tail rope drum concentric with the driving shaft, the tail rope drumbeing mounted to rotate upon the haulage drum, a driver carried by thehaulage drum, an opposeddriver carried by the tail rope drum, a maindriver rotated by the driving shaft, a movable member carried by saidmain driver between the said opposed drum drivers, means automaticallyactuating said movable member to connect the main driver to one or theother of the said opposed drivers in accordance with the direction ofrotation of the driving shaft, and a brake for one of said drums.

12. In a hoist, the combination of a frame, a drivin shaft, a motorconnected to operate t e driving shaft, two concentric drums, an innerdriver on one drum in the form of a ring having external teeth, an outerdriver on the other drum in the form of a concentric ring havin internalteeth, a main driver rotated by t e driving shaft, ..nd a radiallymovable awl carried by said main driver and adapted to engage the teethof the inner or outer driver in accordance with the direction ofrotation of the driving shaft.

13. In a hoist, thecombination of a frame, a drivin shaft, a motorconnected to operate tie driving shaft, two concentric drums, an innerdriver on one drum in the form of a ring having external teeth merginginto cam surfaces, and an outer driver on the other drum in the form ofa concentric ring having internal teeth facing oppositely to the teethon the inner driver and merging into cam surfaces, a main driver rotatedby the drivin shaft, and a radially movable pawl carrie by said maindriver and actuated by said cam surfaces on the inner and outer driversinto engagement with the teeth on one or the other of said drivers inaccordance with the direction of rotation of the driving shaft. 14. In ahoist, the combination of a frame, a driving shaft, a motor connected tooperate the driving shaft, a haulage drum and a tail rope drumconcentric with the driving shaft, the tail rope drum being mounted torotate upon the haulage drum, an inner driver in the form of a ring onthe haulage drum having external teeth, an outer driver on the tail ropedrum in the form of a concentric ring having internal teeth, a maindriver rotated by the drivin shaft, and a radially movable pawl carrieddriver and adapted to engage the teeth of the inner or outer driver inaccordance with the direction of rotation of the driving shaft.

15. In a hoist, the combination of a frame, a driving shaft, a motorconnected to operate the driving shaft, a haulage drum and a tail ropedrum concentric with the driving shaft, the tail rope drum being mountedto rotate upon the haulage drum, an inner driver in the form of a ringon the haulage drum having external teeth merging into by said main camsurfaces, an outer driver on the tail rope drum in the form of aconcentric ring having internal teeth facing oppositely to the teeth onthe inner driver and merging into cam surfaces, a main driver rotated bythe driving shaft, and a radially movable pawl carried by said maindriver and actuated by said- .c am surfaces on the inner and outerdrivers into enga ement with the teeth on one or the other 0 saiddrivers in accordance with the direction of rotation of the drivingshaft,

16. In a hoist, the combination of a frame, a driving shaft, two drumsrotatable rela tively to the driving shaft, a motor connected to operatethe driving shaft, opposed drivers carried by said drums respectively, amain driver-connected to be rotated by the driving shaft in fixedlongitudinal relationship'to the drums, and a pawl carried wholly by themain driver remote from the,

driving shaft for automatically connecting said main driver to one orthe other of the said opposed drivers in accordance with the directionof rotation of the driving. shaft.

17. In a hoist, the combination of a frame, a driving shaft, two drumsadapted to be driven alternately from the driving shaft,

a motor connected to operate the driving shaft, and main driving meansfor the drums, having a bod portion connected to be rotated by the(fiiving shaft in fixed lon itudiral relationship to the drums and incuding a separate drum connecting means carried wholly by the said bodyortion at a substantial distance in a radiaPd-irection from the drivingshaft but automatically loo I adjustable relatively to both the'bodyportion of the main driving means and to. the drums, for automaticallyconnecting the said driving means to one or the other of the drums inaccordance with the direction of rotation of the driving shaft.

18. In a hoist, the combination of a frame, a drivin shaft, two drumsadapted to be driven a ternately fromthe driving shaft, a motorconnected to operate the driving shaft, opposed drivers for the drumsrespectively, a main driver for the drums, means connecting said maindriver to be rotated by the driving shaft in fixed longitudinalrelationship to the drums, and a se arate drum connecting member carriedwho ly by the main driver at a substantial distance in a radialdirection from the driving shaft but movable relatively to both the maindriver and to the opposed drum drivers, for automatically connecting themain driver to one or the other of the o posed drivers in accordancewith the direction of rotation of the drivin shaft.

19. In a oist, the combination of aframe, a driving shaft, two drumsadapted to be driven alternatel from the driving shaft, a motor connectto operate the driving shaft, opposed drivers for the drumsrespectively, a main driver for the drums, means connecting said maindriver to be rotated by the driving shaft in fixed longitudinalrelationship to the drums, and a pawl sep arate from but carriedwholly-by the main driver at a substantial distance in a radialdirection from the driving shaft and movable relatively to both the maindriver and to the opposed drum drivers, for automatically connecting themain driver to one or the other of the opposed drivers in accordancewith the direction'of rotation of the driving shaft.

20. In a hoist, the combination of a frame, a driving shaft, twodrumsadapted to be driven alternatel from the driving shaft, a motor connectsto operate the driving shaft, opposed drivers for the drumsrespectively, each having series of spaced teeth formed with oppositelyinclined faces, a main driver for the drums interposed between the drumdrivers and connected to be rotated b' the driving shaft, and a pawlcarried wholly by the main driver and having a clutch tooth at each end,said clutch teeth being adapted to alternately engage one tooth of theseries of teeth of the oposed drum drivers and being adapted to lieactuatedby the inclined faces of .the said series of teeth on thedrumdrivers, to effect the shifting of the pawl from engagement with onetooth of one drum driver to one tooth of; the other drum driver.

I and rings havin 21. In a hoist, the combination of a reversible motor,a hollow center bearing extendin therefrom, a main shaft within thecenter caring, 'a main driver on the exterior of the center bearinggeared to the main shaft, drums rotatably mounted relatively to thehollow center bearing, and a clutch member on the main driver adapted toconnect either drum to the said main driver.

22. In a hoist, the combination of a reversible motor, a hollow centerbearing extendin therefrom, a main shaft within the center aring, a maindriver on the exterior of the center bearing geared to the main shaft, adrum loosely journaled on the center bearing, another drum rotatablerelatively to the center bearin axis as the first drum, toot ed rings.on adjacent ends of the drums,

and a shiftable pzwl carried by the main driver and located tween thesaid toothed rings, said pawl means for automatically shifting the pawfrom the teeth of one ring to the teeth of the other, and vice versaaccordin 1y as the main river is reversed.

23. In a hoist,- the combination of a frame, a driving shaft, two drumsrotatable rela-' tively to the; driving shaft, a motor connected to ocrate the driving shaft, 0 posed drivers or the drums in t e form 0 rineach having series of oppositely facing teet the teeth of, each seriesextending in the plane of the respective driver on which they areformed, a main driver connected to be rotated by the drivin shaft, and amovable member carried whofiy by the main driver and adapted tocooperate alternately with the teeth of the opposed drivers forautomatically connectingx said main driver to one or the other of t esaid opposed drivers in accordance with the direction of rotation ofthedriving shaft.

24. In a hoist, the combination ofaframe, a driving shaft, two drumsrotatable relatively to the driving shaft, a motor connected to operatethe riving shaft,-opposed drivers for the drums each having series 0JESSE DITSON.

about the same direction of rotation of the i no oppositely facingradially extending teeth,

drivers in ac-

